03
juillet
2026
- Titre : Réponse végétative, florifère et productive de l’olivier et variation de la composition phénolique de l’huile d’olive suite à l’utilisation de fertilisants foliaires biostimulants et cytotoxique
- DOI: 10.71751/JAAOGv1i1y2022-24-41
- Auteur :Imen ZOUARI; Beligh MECHRI; Faouzi ATTIA; Amel MGUIDICHE; Mohamed HAMMAMI; Mouna MEZGHANI AIACHI
- Abstract : Foliar fertilization is practiced to supplement the needs of the olive tree in order to improve yields while respecting the environment. The appearace of new inputs such as biostimulants helps stimulate natural processes in order to improve nutrient uptake and efficiency, tolerance to abiotic stress and crop quality. This research aimed to test different fertilizers and biostimulants, applied at different periods of the biological cycle of the olive tree. Two fertilizers, F1 rich in nitrogen and F2 rich in boron applied before flowering and a biostimulant F3 rich in calcium, applied during fruit growth were tested and applied during two successive years in a row on rain-fed olive trees of the Chemlali variety. The effects of these applications on the vegetative growth and flowering potential of the olive tree during two years of foliar treatments were studied. After two years of fertilization, the cumulative production was calculated and the olive oil was extracted to determine the content of total polyphenols as well as the phenolic compounds profile. One year after foliar fertilization, the treatment F1 rich in nitrogen improved the vegetative growth in length and thickness. After two years of fertilization, all treatments improved the vegetative growth. Flowering density was improved following the application of the treatment rich in nitrogen. Calcium-based treatment F3 showed the highest cumulative production. The most abundant phenolic compound is oleuropein aglycone. The treatment F3 rich in calcium-increased the content of the majority of phenolic compounds. This work has shown that foliar treatments can improve the vegetative and productive potential of the olive tree and optimize the quality of olive oil, particularly for the treatment F3 rich in calcium.
- Pagination : 24-41
03
juillet
2026
- Titre : Caractérisation physicochimique de l’huile de l’Opuntia ficus indica (L.) de la Tunisie et évaluation de ses activités anti-oxydante, antibactérienne et cytotoxique
- DOI: 10.71751/JAAOGv1i2y2022-9-30
- Auteur : Sana BARDAA; Fatma ALOUI; Riadh BEN MANSOUR; Hazem JABEUR; Mohamed BOUAZIZ; Zouheir SAHNOUN
- Abstract : Today, the emerging potential of l’Opuntia ficus indica (L.) (Prickly pear) oil application in pharmaceutical and cosmetic industries has prompted researchers to study its stability and to determine its compounds in order to improve its economic utility. In this context, the utmost aim of the current research was to assess the physicochemical properties of Opuntia ficus india L extracted oil from Tunisia and to appraise its antimicrobial activity and its cytotoxic activity against HeLa cell lines.
The prickly pear oil was analysed for antimicrobial activity by disc diffusion assay and minimum inhibition concentration against four bacteria. The oil was also tested for the DPPH free-radical scavenging activity and cytotoxicity.
Prickly pear oil extracted by cold press was light yellow in colour, stable and had good quality with low peroxide value.
Linoleic acid (55.731 %), oleic acid (20.788 %) and β-sitosterol were the most prominent in prickly pear extracted seed oil. The oil showed moderate antibacterial activity when compared to the reference (gentamicin). The oil recorded highest anti-bacteria activities against Bacillus subtilis. It exhibited remarkable antioxidant property due its richness of α-tocopherol.
According to the MTT test, prickly pear oil seems to be free of any toxicity and could be used in dermopharmacy. - Pagination : 9-30
03
juillet
2026
- Titre : Adaptabilité de la phénologie florale de l'olivier dans différents environnements du centre et du sud tunisien
- DOI: 10.71751/JAAOGv1i2y2022-31-43
- Auteur : Olfa Elloumi; Ines Regaieg; Haifa Benmoussa; Mounir Abichou; Fathi Ben Amar; Mehdi Ben Mimoun; Mohamed Ghrab
- Abstract : Tunisia has been identified as a 'Hotspot' for observed and projected temperature increases. These climate changes have significant impacts on agriculture, including the olive sector that has significant socio-economic benefits at the national level. In this context, floral phenology has experienced renewed interest in recent years, in order to estimate the future olive tree (Olea europaea L.) adaptation in different production areas. The objective of this study is to evaluate the phenological adaptability of four local (Chemlali, Chétoui) and foreign (Arbequina, Koronéiki) olive cultivars to various agro-climatic conditions in central and southern Tunisia: Jammel (35 ° 75 ', 10 ° 75'), Sfax (34 ° 94 ', 10 ° 60') and Zarziz (33 ° 30 ', 11 ° 06'). Budburst, pre-flowering and flowering stages were monitored from the start of the 2015-season and were, subsequently, linked to the climatic conditions of each area. Results showed that the olive floral phenology is variable depending on the genotype and the climatic conditions of each environment. Budburst stage was earlier in the Zarzis region characterized by a warm winter with an average chill accumulation of 28.4 CP and 'Chemlali' was the earliest (between 17 and 21 March) compared to the other cultivars. Pre-flowering and flowering stages are mainly related to spring temperatures and the production area altitude. Following spring temperatures increases (maximum temperatures > 35 ° C), harmful impacts on floral phenology (browning and development block of flower buds in the differentiation stage) were observed on the ‘Chetoui’ cultivar in the Jammel region. These impacts were less important for the other cultivars and in the two other regions where the temperature increase took place towards the end of their flowering period. In conclusion, this preliminary study emphasizes the advantages of multi-environment trials as a tool to deal with the predicted future variability of environmental conditions caused by global warming.
- Pagination : 31-43
03
juillet
2026
- Titre : Caractérisation pomologique et physicochimique d’oliviers de la collection de Boughrara (sfax, Tunisie)
- DOI: 10.71751/JAAOGv1i2y2022-44-58
- Auteur : Hayet FOURATI; Mohamed AYADI; Fatma BACCARI; Gouta BEN AHMED; Fathi BEN AMAR
- Abstract : In Tunisia, the olive oil sector occupies an important place in the national economy. However, our exports of this product are mainly in bulk and our challenge is to work on the quality of olive oil and its packaging to improve our foreign exchange income. In addition, the evolution of the global economic context towards the liberalization of trade will lead to an increasingly competitive market and will require an improvement in the quantity (a good yield) and the Tunisian olive oil quality with a view to greater compliance with standards.
Tunisia's olive varietal heritage is very rich in varieties although the Tunisian olive grove is dominated by Chemlali Sfax and Chétoui varieties for olive oil and Meski for table olive. In addition, this heritage is very rich in local varieties and ecotypes which are kept in the collection of the olive tree of Boughrara (Sfax). The oil of part of this heritage has been characterized in situ (site of origin or in-situ) and most of these varieties are only cultivated in their sites of origin and whose oil quality is not known.
The present work falls within this framework and consists in studying the pomological characteristics of olives and the physicochemical characteristics of the oils of local varieties and ecotypes of olive trees in the Boughrara collection (ex-situ) in order to select the varieties that meet the quality criteria. - Pagination : 44-58
